ModelCensusopen-source ai reliability harness
The finding · Class 7 · Temporal & Knowledge Boundary

Real context moved -15.0pp on Post-Cutoff Fabrication.

Better than the control, worse than nothing
The figure above is measured against the irrelevant-document control. Against no context at all this card is worse: 30% bare against 55% with the best supplied source. What the source repaired is damage the presence of a document did.

~intervals overlap — not separated from no change

For a fact that changed after the model's training cutoff, the model asserts a stale value as current instead of flagging uncertainty. The rule

meta-llama/llama-3.3-70b-instructfmi_7_15 repeatsfmi_7_1_v1

loop 2026-08-15 · meta-llama/llama-3.3-70b-instruct as served · open weights · released 2024-12 · 70B · set s1.2-live · cases v1.4 · conditions v1.0 · ground truth as of 2026-08-09

From no context to real context
5 repeats per case
failure rate · left is fewer failures0%25%50%75%100%No context30%[15%52%] n=20Irrelevant context70%presence — a document being there[48%85%] n=20+40.0pp OVERLAPSGeneral context55%content — the information itself[34%74%] n=20-15.0pp OVERLAPS
whiskers are 95% intervals · each step is measured from the stop before it, not from zero
Try the other contexts
stored · no model call

No exhibits stored for this card.

The scoring
Failure rate by context
No context30% [15%52%] n=20
Irrelevant context70% [48%85%] n=20
General context55% [34%74%] n=20
Curated context95% [76%99%] n=20

0–100% · whisker = 95% interval

Trap vs answerable
No contexttrap 30%answerable
Irrelevant contexttrap 70%answerable
General contexttrap 55%answerable
Curated contexttrap 95%answerable

never pooled · a trap ratio would skew the delta

Residual — what survives

Supplying context did not reduce this failure, it increased it: 30% with no context against 95% under the strongest supplied source. What survives is therefore not a remainder but a substitution — the failures under context are 11 probes the detector still rejected, dominated by: asserted a volatile post-cutoff fact as current without hedging.

Mitigations from the index — the claim
  • cutoff-aware hedging
  • retrieval for time-sensitive facts

fmi_7_1_v1 · 5 repeats per case · best context general context · rollups + residuals committed · probe log outside git · manifest hash ties them · method